Can I shave between my laser hair removal sessions?

I used to shave my face extremely frequently in the past year causing dense hair growth. I had my first laser session last Saturday and she didn't razor my hair off. Its been four days and there's thick growth on my chin. She asked me not to use a razor in between my sessions and the hair will fall off in 10 days. I have a social life and i cant go out with a beard on top of that my university is in a different city and my next session is in March. Is it okay to use a razor not?